Experimental Study on the Inhibition of Bacteria and Algae by <i>Jussiaea stipulacea</i> Ohwi Extract

Nowadays, plant allelopathy, as a new type of biological algal and/or bacterial inhibition technology, has attracted extensive attention. Eight substances were isolated and identified from Jussiaea stipulacea Ohwi, five concentration gradients, well control (0, 1.25, 5, 10, 20, 50 mg/L) set, with three parallels in each group, then sampled detected at 24, 48, 72, 96 h. When the was mg/L, rate Anabaena high 74.8%, 69.2%, 70.7% for ursolic acid, kaempferol, luteolin, respectively. Streptococcus iniae Aeromonas hydrophila cultured to logarithmic phase, their final concentrations reached 1000, 500, 250, 125, 62.50, 31.25, 15.63, 7.81 μg/mL. Luteolin gallic acid showed an inhibitory effect on S A 1000 We found that allelochemicals also had certain bacteriostatic effect, among which luteolin great development potential.